#include <errno.h>
#include <string.h>
#include <dirent.h>
+#include <fcntl.h>
#include <sys/stat.h>
#include "libudev.h"
int num_fake_partitions;
int devlink_priority;
int ignore_remove;
+ struct list_head attr_list;
};
static size_t devpath_to_db_path(struct udev *udev, const char *devpath, char *filename, size_t len)
udev_device->udev = udev;
INIT_LIST_HEAD(&udev_device->link_list);
INIT_LIST_HEAD(&udev_device->env_list);
+ INIT_LIST_HEAD(&udev_device->attr_list);
info(udev_device->udev, "udev_device: %p created\n", udev_device);
return udev_device;
}
free(udev_device->driver);
free(udev_device->devpath_old);
free(udev_device->physdevpath);
+ util_name_list_cleanup(udev_device->udev, &udev_device->attr_list);
info(udev_device->udev, "udev_device: %p released\n", udev_device);
free(udev_device);
}
return udev_device->seqnum;
}
+const char *udev_device_get_attr_value(struct udev_device *udev_device, const char *attr)
+{
+ char path[UTIL_PATH_SIZE];
+ char value[UTIL_NAME_SIZE];
+ struct stat statbuf;
+ int fd;
+ ssize_t size;
+ const char *val = NULL;
+
+ util_strlcpy(path, udev_device_get_syspath(udev_device), sizeof(path));
+ util_strlcat(path, "/", sizeof(path));
+ util_strlcat(path, attr, sizeof(path));
+
+ if (lstat(path, &statbuf) != 0) {
+ info(udev_device->udev, "stat '%s' failed: %s\n", path, strerror(errno));
+ goto out;
+ }
+
+ if (S_ISLNK(statbuf.st_mode)) {
+ /* links return the last element of the target path */
+ char target[UTIL_NAME_SIZE];
+ int len;
+ char *pos;
+
+ len = readlink(path, target, sizeof(target));
+ if (len > 0) {
+ target[len] = '\0';
+ pos = strrchr(target, '/');
+ if (pos != NULL) {
+ pos = &pos[1];
+ info(udev_device->udev, "cache '%s' with link value '%s'\n", attr, pos);
+ val = util_name_list_add(udev_device->udev, &udev_device->attr_list, attr, pos, 0)->value;
+ }
+ }
+ goto out;
+ }
+
+ /* skip directories */
+ if (S_ISDIR(statbuf.st_mode))
+ goto out;
+
+ /* skip non-readable files */
+ if ((statbuf.st_mode & S_IRUSR) == 0)
+ goto out;
+
+ /* read attribute value */
+ fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ info(udev_device->udev, "attribute '%s' can not be opened\n", path);
+ goto out;
+ }
+ size = read(fd, value, sizeof(value));
+ close(fd);
+ if (size < 0)
+ goto out;
+ if (size == sizeof(value))
+ goto out;
+
+ /* got a valid value, store and return it */
+ value[size] = '\0';
+ util_remove_trailing_chars(value, '\n');
+ info(udev_device->udev, "'%s' has attribute value '%s'\n", path, value);
+ val = util_name_list_add(udev_device->udev, &udev_device->attr_list, attr, value, 0)->value;
+out:
+ return val;
+}
int device_set_devpath(struct udev_device *udev_device, const char *devpath)
{
if (asprintf(&udev_device->syspath, "%s%s", udev_get_sys_path(udev_device->udev), devpath) < 0)
int device_add_devlink(struct udev_device *udev_device, const char *devlink)
{
- if (util_name_list_add(udev_device->udev, &udev_device->link_list, devlink, 0) == NULL)
+ if (util_name_list_add(udev_device->udev, &udev_device->link_list, devlink, NULL, 0) == NULL)
return -ENOMEM;
return 0;
}
int device_add_property(struct udev_device *udev_device, const char *property)
{
- if (util_name_list_add(udev_device->udev, &udev_device->env_list, property, 0) == NULL)
+ if (util_name_list_add(udev_device->udev, &udev_device->env_list, property, NULL, 0) == NULL)
return -ENOMEM;
return 0;
}
#include "udev.h"
-static void print_all_attributes(struct udev *udev, const char *devpath, const char *key)
+static void print_all_attributes(struct udev_device *device, const char *key)
{
- char path[UTIL_PATH_SIZE];
DIR *dir;
struct dirent *dent;
- util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
- util_strlcat(path, devpath, sizeof(path));
-
- dir = opendir(path);
+ dir = opendir(udev_device_get_syspath(device));
if (dir != NULL) {
for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
struct stat statbuf;
char filename[UTIL_PATH_SIZE];
- char *attr_value;
- char value[UTIL_NAME_SIZE];
+ const char *value;
size_t len;
if (dent->d_name[0] == '.')
if (strcmp(dent->d_name, "dev") == 0)
continue;
- util_strlcpy(filename, path, sizeof(filename));
+ util_strlcpy(filename, udev_device_get_syspath(device), sizeof(filename));
util_strlcat(filename, "/", sizeof(filename));
util_strlcat(filename, dent->d_name, sizeof(filename));
if (lstat(filename, &statbuf) != 0)
if (S_ISLNK(statbuf.st_mode))
continue;
- attr_value = sysfs_attr_get_value(udev, devpath, dent->d_name);
- if (attr_value == NULL)
+ value = udev_device_get_attr_value(device, dent->d_name);
+ if (value == NULL)
continue;
- len = util_strlcpy(value, attr_value, sizeof(value));
- if(len >= sizeof(value))
- len = sizeof(value) - 1;
dbg(udev, "attr '%s'='%s'(%zi)\n", dent->d_name, value, len);
/* skip nonprintable attributes */
- while (len && isprint(value[len-1]))
+ len = strlen(value);
+ while (len > 0 && isprint(value[len-1]))
len--;
- if (len) {
- dbg(udev, "attribute value of '%s' non-printable, skip\n", dent->d_name);
+ if (len > 0) {
+ dbg(info, "attribute value of '%s' non-printable, skip\n", dent->d_name);
continue;
}
printf("\n");
}
-static int print_device_chain(struct udev *udev, const char *devpath)
+static int print_device_chain(struct udev_device *device)
{
- struct udev_device *device;
struct udev_device *device_parent;
const char *str;
- device = udev_device_new_from_devpath(udev, devpath);
- if (device == NULL)
- return -1;
-
printf("\n"
"Udevinfo starts with the device specified by the devpath and then\n"
"walks up the chain of parent devices. It prints for every device\n"
if (str == NULL)
str = "";
printf(" DRIVER==\"%s\"\n", str);
- print_all_attributes(udev, udev_device_get_devpath(device), "ATTR");
+ print_all_attributes(device, "ATTR");
device_parent = device;
do {
if (str == NULL)
str = "";
printf(" DRIVERS==\"%s\"\n", str);
- print_all_attributes(udev, udev_device_get_devpath(device_parent), "ATTRS");
+ print_all_attributes(device_parent, "ATTRS");
} while (device_parent != NULL);
- udev_device_unref(device);
return 0;
}
-static void print_record(struct udevice *udevice)
+static int print_record_devlinks_cb(struct udev_device *device, const char *value, void *data)
{
- struct name_entry *name_loop;
-
- printf("P: %s\n", udevice->dev->devpath);
- printf("N: %s\n", udevice->name);
- list_for_each_entry(name_loop, &udevice->symlink_list, node)
- printf("S: %s\n", name_loop->name);
- if (udevice->link_priority != 0)
- printf("L: %i\n", udevice->link_priority);
- if (udevice->partitions != 0)
- printf("A:%u\n", udevice->partitions);
- if (udevice->ignore_remove)
- printf("R:%u\n", udevice->ignore_remove);
- list_for_each_entry(name_loop, &udevice->env_list, node)
- printf("E: %s\n", name_loop->name);
+ size_t len;
+
+ len = strlen(udev_get_dev_path(udev_device_get_udev(device)));
+ printf("S: %s\n", &value[len+1]);
+ return 0;
}
-static void export_db(struct udev *udev)
+static int print_record_properties_cb(struct udev_device *device, const char *key, const char *value, void *data)
{
- LIST_HEAD(name_list);
- struct name_entry *name_loop;
-
- udev_db_get_all_entries(udev, &name_list);
- list_for_each_entry(name_loop, &name_list, node) {
- struct udevice *udevice_db;
-
- udevice_db = udev_device_init(udev);
- if (udevice_db == NULL)
- continue;
- if (udev_db_get_device(udevice_db, name_loop->name) == 0)
- print_record(udevice_db);
- printf("\n");
- udev_device_cleanup(udevice_db);
- }
- name_list_cleanup(udev, &name_list);
+ printf("E: %s=%s\n", key, value);
+ return 0;
}
-static int lookup_device_by_name(struct udev *udev, struct udevice **udevice, const char *name)
+static void print_record(struct udev_device *device)
{
+ size_t len;
+ int i;
+
+ printf("P: %s\n", udev_device_get_devpath(device));
+ len = strlen(udev_get_dev_path(udev_device_get_udev(device)));
+ printf("N: %s\n", &udev_device_get_devname(device)[len+1]);
+ i = device_get_devlink_priority(device);
+ if (i != 0)
+ printf("L: %i\n", i);
+ i = device_get_num_fake_partitions(device);
+ if (i != 0)
+ printf("A:%u\n", i);
+ i = device_get_ignore_remove(device);
+ if (i != 0)
+ printf("R:%u\n", i);
+ udev_device_get_devlinks(device, print_record_devlinks_cb, NULL);
+ udev_device_get_properties(device, print_record_properties_cb, NULL);
+ printf("\n");
+}
+
+static int export_all_cb(struct udev *udev,
+ const char *devpath, const char *subsystem, const char *name,
+ void *data)
+{
+ struct udev_device *device;
+
+ device = udev_device_new_from_devpath(udev, devpath);
+ if (device == NULL)
+ return 0;
+ if (udev_device_get_devname(device) != NULL)
+ print_record(device);
+ udev_device_unref(device);
+ return 0;
+}
+
+static struct udev_device *lookup_device_by_name(struct udev *udev, const char *name)
+{
+#if 0
+ /* FIXME */
LIST_HEAD(name_list);
int count;
struct name_entry *device;
out:
name_list_cleanup(udev, &name_list);
return rc;
+#endif
+ return NULL;
+}
+
+static int add_devlink_cb(struct udev_device *device, const char *value, void *data)
+{
+ char **links = data;
+
+ if (*links == NULL) {
+ *links = strdup(value);
+ } else {
+ char *str;
+
+ asprintf(&str, "%s %s", *links, value);
+ free(*links);
+ *links = str;
+ }
+ return 0;
+}
+
+static int add_devlink_noroot_cb(struct udev_device *device, const char *value, void *data)
+{
+ size_t len;
+
+ len = strlen(udev_get_dev_path(udev_device_get_udev(device)));
+ value = &value[len+1];
+ return add_devlink_cb(device, value, data);
+}
+
+static int print_property_cb(struct udev_device *device, const char *key, const char *value, void *data)
+{
+ printf("%s=%s\n", key, value);
+ return 0;
}
static int stat_device(const char *name, int export, const char *prefix)
int udevadm_info(struct udev *udev, int argc, char *argv[])
{
- struct udevice *udevice = NULL;
+ struct udev_device *device = NULL;
int root = 0;
int export = 0;
const char *export_prefix = NULL;
+ char path[UTIL_PATH_SIZE];
+ char name[UTIL_PATH_SIZE];
+ char *links;
+ int rc = 0;
static const struct option options[] = {
{ "name", 1, NULL, 'n' },
QUERY_ALL,
} query = QUERY_NONE;
- char path[UTIL_PATH_SIZE] = "";
- char name[UTIL_PATH_SIZE] = "";
- struct name_entry *name_loop;
- int rc = 0;
-
while (1) {
int option;
dbg(udev, "option '%c'\n", option);
switch (option) {
case 'n':
+ if (device != NULL) {
+ fprintf(stderr, "device already specified\n");
+ rc = 2;
+ goto exit;
+ }
/* remove /dev if given */
if (strncmp(optarg, udev_get_dev_path(udev), strlen(udev_get_dev_path(udev))) == 0)
util_strlcpy(name, &optarg[strlen(udev_get_dev_path(udev))+1], sizeof(name));
else
util_strlcpy(name, optarg, sizeof(name));
util_remove_trailing_chars(name, '/');
- dbg(udev, "name: %s\n", name);
+ device = lookup_device_by_name(udev, name);
break;
case 'p':
+ if (device != NULL) {
+ fprintf(stderr, "device already specified\n");
+ rc = 2;
+ goto exit;
+ }
/* remove /sys if given */
if (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) == 0)
util_strlcpy(path, &optarg[strlen(udev_get_sys_path(udev))], sizeof(path));
else
util_strlcpy(path, optarg, sizeof(path));
util_remove_trailing_chars(path, '/');
-
- /* possibly resolve to real devpath */
- if (util_resolve_sys_link(udev, path, sizeof(path)) != 0) {
- char temp[UTIL_PATH_SIZE];
- char *pos;
-
- /* also check if the parent is a link */
- util_strlcpy(temp, path, sizeof(temp));
- pos = strrchr(temp, '/');
- if (pos != 0) {
- char tail[UTIL_PATH_SIZE];
-
- util_strlcpy(tail, pos, sizeof(tail));
- pos[0] = '\0';
- if (util_resolve_sys_link(udev, temp, sizeof(temp)) == 0) {
- util_strlcpy(path, temp, sizeof(path));
- util_strlcat(path, tail, sizeof(path));
- }
- }
- }
- dbg(udev, "path: %s\n", path);
+ device = udev_device_new_from_devpath(udev, path);
break;
case 'q':
action = ACTION_QUERY;
action = ACTION_ATTRIBUTE_WALK;
break;
case 'e':
- export_db(udev);
+ udev_enumerate_devices(udev, NULL, export_all_cb, NULL);
goto exit;
case 'x':
export = 1;
}
}
- /* run action */
switch (action) {
case ACTION_QUERY:
- /* needs devpath or node/symlink name for query */
- if (path[0] != '\0') {
- udevice = udev_device_init(udev);
- if (udevice == NULL) {
- rc = 1;
- goto exit;
- }
- if (udev_db_get_device(udevice, path) != 0) {
- fprintf(stderr, "no record for '%s' in database\n", path);
- rc = 3;
- goto exit;
- }
- } else if (name[0] != '\0') {
- if (lookup_device_by_name(udev, &udevice, name) != 0) {
- fprintf(stderr, "node name not found\n");
- rc = 4;
- goto exit;
- }
- } else {
- fprintf(stderr, "query needs --path or node --name specified\n");
+ if (device == NULL) {
+ fprintf(stderr, "query needs --path= or node --name= specified\n");
rc = 4;
goto exit;
}
switch(query) {
case QUERY_NAME:
- if (root)
- printf("%s/%s\n", udev_get_dev_path(udev), udevice->name);
- else
- printf("%s\n", udevice->name);
- break;
- case QUERY_SYMLINK:
- list_for_each_entry(name_loop, &udevice->symlink_list, node) {
- char c = name_loop->node.next != &udevice->symlink_list ? ' ' : '\n';
+ if (root) {
+ printf("%s\n", udev_device_get_devname(device));
+ } else {
+ size_t len;
- if (root)
- printf("%s/%s%c", udev_get_dev_path(udev), name_loop->name, c);
- else
- printf("%s%c", name_loop->name, c);
+ len = strlen(udev_get_dev_path(udev));
+ printf("%s\n", &udev_device_get_devname(device)[len+1]);
}
break;
+ case QUERY_SYMLINK:
+ links = NULL;
+ if (root)
+ udev_device_get_devlinks(device, add_devlink_cb, &links);
+ else
+ udev_device_get_devlinks(device, add_devlink_noroot_cb, &links);
+ printf("%s\n", links);
+ free(links);
+ break;
case QUERY_PATH:
- printf("%s\n", udevice->dev->devpath);
+ printf("%s\n", udev_device_get_devpath(device));
goto exit;
case QUERY_ENV:
- list_for_each_entry(name_loop, &udevice->env_list, node)
- printf("%s\n", name_loop->name);
+ udev_device_get_properties(device, print_property_cb, NULL);
break;
case QUERY_ALL:
- print_record(udevice);
+ print_record(device);
break;
default:
fprintf(stderr, "unknown query type\n");
}
break;
case ACTION_ATTRIBUTE_WALK:
- if (path[0] != '\0') {
- if (print_device_chain(udev, path) != 0) {
- fprintf(stderr, "no valid sysfs device found\n");
- rc = 4;
- goto exit;
- }
- } else if (name[0] != '\0') {
- if (lookup_device_by_name(udev, &udevice, name) != 0) {
- fprintf(stderr, "node name not found\n");
- rc = 4;
- goto exit;
- }
- if (print_device_chain(udev, udevice->dev->devpath) != 0) {
- fprintf(stderr, "no valid sysfs device found\n");
- rc = 4;
- goto exit;
- }
- } else {
+ if (device == NULL) {
fprintf(stderr, "attribute walk needs --path or node --name specified\n");
rc = 5;
goto exit;
}
+ print_device_chain(device);
break;
case ACTION_DEVICE_ID_FILE:
if (stat_device(name, export, export_prefix) != 0)
}
exit:
- udev_device_cleanup(udevice);
+ udev_device_unref(device);
return rc;
}
~ianmdlvl / elogind.git / commitdiff